package com.icode.gulimall.order.interceptor;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.stereotype.Component;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * 自定义feign请求拦截器
 *
 * @Author: my_code
 * @Email: my_code@foxmail.com
 * @Create: 2021-01-22 21:59
 */
@Component
public class FeignRequestInterceptor implements RequestInterceptor {

    @Override
    public void apply(RequestTemplate template) {
        //1、使用RequestContextHolder拿到刚进来的请求数据
        ServletRequestAttributes requestAttributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        if (requestAttributes != null) {
            //老请求
            HttpServletRequest request = requestAttributes.getRequest();
            if (request != null) {
                //2、同步请求头的数据（主要是cookie）
                //把老请求的cookie值放到新请求上来，进行一个同步
                String cookie = request.getHeader("Cookie");
                template.header("Cookie", cookie);
            }
        }
    }
}